My gf and roommate are wrong

They both believe the cast needs to be reworked and that it's not on the level of other musicals(my roommate has only ever listened to Hamilton), they think the songs need to be changed and their isn't enough inflection in the singing (I can agree with some parts they've pointed out like "get in the water" should have a little more anger, how do I cleanse these heritics and show them the light that is epic. For Zues's sake they want to change half the singers and my roommate thinks all the settings for the final product should look like Atlantis for some reason?